I don't think you were out of line.
you bought it in January and you were told you get a year's worth of free oil changes.. so you're covered till this January. this is provided they never put any stipulations on a maximum amount of oil changes you can get a year. how many did you get this year? oil changes cost the dealership next to nothing anyway. I might've complained about them trying to rip you off and made him honour the agreement until the end of January
